The selection of literature including Congo Cinquante Ans D'Histoire Postale by Jean Du Four (1962) bound in quarter blue calf, The "Cockrill" series booklets (numbers 41, 43 and 44) by Abbé G. Gudenkauf bound together in full blue-grey calf, Le Congo Belge et ses Marques Postales by André de Cock (1931 signed limited edition, No 9 of 25 copies on art paper) original card covers, État Independant du Congo - Étude du Mols by J-M Frenay - eight volumes (1988-93) for the 10c., 25c., 40c., 50c., 1f., 3f.50c., 5f. and 10f.; Les Premieres Valeurs Postales and Emission Dite de 1887 both by E. & M. Deneumostier, The Cancellations of the Normal Post Offices of Belgian Congo 1886-1960 by A.I. Heim and R.H. Keach (1992 second edition) and others. (18)